Hierro's main concern, however, will be that Spain are able to break down an obdurate Iranian defense that conceded only five times in 18 qualifiers and get the goals they need to give them the best chance of topping Group B.
In a clip shared with her 977,000 Instagram followers, the singer could be seen grinning as she waved her arms in the air.
Edurne shimmied her body in the Boomerang capture, which showed her looking away from the camera.
The player has been assuming the role of Paul the Octopus for this tournament, although his prediction of a 3-1 win over Portugal proved to be incorrect.
Spain and Portugal are tied for second in Group B with one point each, while Iran leads the group with three points after beating Morocco 1-0 earlier Friday.
"We will stick to the style that defines us as a team, but we have to pass the ball around a lot more and maintain possession".
Diego Costa scored a fine brace in the opener and is likely to start again against Iran. "He will play, we trust him".
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Heading into the tournament in Russia, Iran had previously only won a single game at a World Cup against the United States in 1998, however after a tight and testing 90 minutes against Morocco, Iran were gifted a late victor thanks to an own goal in additional time.
"It was not a miracle that we won". I know that Carlos really tried getting me [as a player], we have a very close relationship, we are close friends, but those playing are the players.
"We are only on the bench and we try to do as little as possible during the game".
In their 1-0 victory over Morocco, Iran became the first team since 1966 to score a goal without attempting a shot during a half of World Cup football - their victor was a 90th minute own goal by Morocco's Aziz Bouhaddouz.
Iran will take on 2010 worl cup winners with a slender edge by winning with a narrow margin against Morocco.
"It's a crucial match that will determine our World Cup destiny", said Isco.
Joaquin explained in his latest video for Movistar that Cristiano Ronaldo can cause shocks.